      SUBROUTINE iau_BI00 ( DPSIBI, DEPSBI, DRA )
*+
*  - - - - - - - - -
*   i a u _ B I 0 0
*  - - - - - - - - -
*
*  Frame bias components of IAU 2000 precession-nutation models (part of
*  MHB2000 with additions).
*
*  This routine is part of the International Astronomical Union's
*  SOFA (Standards of Fundamental Astronomy) software collection.
*
*  Status:  canonical model.
*
*  Returned:
*     DPSIBI,DEPSBI  d   longitude and obliquity corrections
*     DRA            d   the ICRS RA of the J2000.0 mean equinox
*
*  Notes:
*
*  1) The frame bias corrections in longitude and obliquity (radians)
*     are required in order to correct for the offset between the GCRS
*     pole and the J2000.0 mean pole.  They define, with respect to the
*     GCRS frame, a J2000.0 mean pole that is consistent with the rest
*     of the IAU 2000A precession-nutation model.
*
*  2) In addition to the displacement of the pole, the complete
*     description of the frame bias requires also an offset in right
*     ascension.  This is not part of the IAU 2000A model, and is from
*     Chapront et al. (2002).  It is returned in radians.
*
*  3) This is a supplemented implementation of one aspect of the IAU
*     2000A nutation model, formally adopted by the IAU General Assembly
*     in 2000, namely MHB2000 (Mathews et al. 2002).
*
*  References:
*
*     Chapront, J., Chapront-Touze, M. & Francou, G., Astron.Astrophys.,
*     387, 700, 2002.
*
*     Mathews, P.M., Herring, T.A., Buffet, B.A., "Modeling of nutation
*     and precession   New nutation series for nonrigid Earth and
*     insights into the Earth's interior", J.Geophys.Res., 107, B4,
*     2002.  The MHB2000 code itself was obtained on 9th September 2002
*     from ftp://maia.usno.navy.mil/conv2000/chapter5/IAU2000A.
*
*  This revision:  2009 December 15
*
*  SOFA release 2015-02-09
*
*  Copyright (C) 2015 IAU SOFA Board.  See notes at end.
*
*-----------------------------------------------------------------------

      IMPLICIT NONE

      DOUBLE PRECISION DPSIBI, DEPSBI, DRA

*  Arcseconds to radians
      DOUBLE PRECISION DAS2R
      PARAMETER ( DAS2R = 4.848136811095359935899141D-6 )

*  The frame bias corrections in longitude and obliquity
      DOUBLE PRECISION DPBIAS, DEBIAS
      PARAMETER ( DPBIAS = -0.041775D0 * DAS2R,
     :            DEBIAS = -0.0068192D0 * DAS2R )

*  The ICRS RA of the J2000.0 equinox (Chapront et al., 2002)
      DOUBLE PRECISION DRA0
      PARAMETER ( DRA0 = -0.0146D0 * DAS2R )

* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

*  Return the results (which are fixed).
      DPSIBI = DPBIAS
      DEPSBI = DEBIAS
      DRA = DRA0

*  Finished.

*+----------------------------------------------------------------------
*
*  Copyright (C) 2015
*  Standards Of Fundamental Astronomy Board
*  of the International Astronomical Union.
*
*  =====================
*  SOFA Software License
*  =====================
*
*  NOTICE TO USER:
*
*  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
*  CONDITIONS WHICH APPLY TO ITS USE.
*
*  1. The Software is owned by the IAU SOFA Board ("SOFA").
*
*  2. Permission is granted to anyone to use the SOFA software for any
*     purpose, including commercial applications, free of charge and
*     without payment of royalties, subject to the conditions and
*     restrictions listed below.
*
*  3. You (the user) may copy and distribute SOFA source code to others,
*     and use and adapt its code and algorithms in your own software,
*     on a world-wide, royalty-free basis.  That portion of your
*     distribution that does not consist of intact and unchanged copies
*     of SOFA source code files is a "derived work" that must comply
*     with the following requirements:
*
*     a) Your work shall be marked or carry a statement that it
*        (i) uses routines and computations derived by you from
*        software provided by SOFA under license to you; and
*        (ii) does not itself constitute software provided by and/or
*        endorsed by SOFA.
*
*     b) The source code of your derived work must contain descriptions
*        of how the derived work is based upon, contains and/or differs
*        from the original SOFA software.
*
*     c) The names of all routines in your derived work shall not
*        include the prefix "iau" or "sofa" or trivial modifications
*        thereof such as changes of case.
*
*     d) The origin of the SOFA components of your derived work must
*        not be misrepresented;  you must not claim that you wrote the
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*
*     e) These requirements must be reproduced intact in any source
*        distribution and shall apply to anyone to whom you have
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*
*     Note that, as originally distributed, the SOFA software is
*     intended to be a definitive implementation of the IAU standards,
*     and consequently third-party modifications are discouraged.  All
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*
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*
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*
*  6. The provision of any version of the SOFA software under the terms
*     and conditions specified herein does not imply that future
*     versions will also be made available under the same terms and
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*
*  In any published work or commercial product which uses the SOFA
*  software directly, acknowledgement (see www.iausofa.org) is
*  appreciated.
*
*  Correspondence concerning SOFA software should be addressed as
*  follows:
*
*      By email:  sofa@ukho.gov.uk
*      By post:   IAU SOFA Center
*                 HM Nautical Almanac Office
*                 UK Hydrographic Office
*                 Admiralty Way, Taunton
*                 Somerset, TA1 2DN
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*
*-----------------------------------------------------------------------

      END
